If the battery is fully charged and you are still not able to get the key out, then there may be an issue with the shift interlock mechanism or wiring. You will need to locate a wiring schematic, troubleshooting info, and do some testing to isolate the failed wiring or component. If you are not comfortable with the troubleshooting, it is time to find someone who is, so that parts are not replaced on a guess, because that gets real expensive real quickly.

is it a floor shift if it is. then it may be the knob on the shifter handle go to junk yard get the shifter assy mine cost 50.00 inside the handle is broken.just the knob itself may fix your problem.it may be held on with a c ring looking device